Exhaust gas vent tube

Abstract

An exhaust tube for cryothermal vessels includes means for deflecting the exhaust gas upon entry into the tube.

What is claimed is: 
     
       1. In an upright cryogenic vessel having a filling pipe for filling the vessel with a low-boiling cryogenic liquid to a predetermined level in the vessel and having a vertically extending exhaust tube in the vessel extending to the predetermined level and leading to the exterior of the vessel for discharging exhaust gas which occurs during the filling process whereby the occurrence of liquid in the exhaust tube indicates the completion of the filling process and the reaching of the predetermined level by the liquid, the improvement being said exhaust tube including deflection means for separating droplets of liquid by deflection of the exhaust gas stream, said exhaust tube being closed at its end below said predetermined level and having a side inlet opening at said predetermined level to comprise said deflection means. 
     
     
       2. In the vessel of claim 1 wherein said end of said exhaust tube is closed by means of a plate sealing said end, and said side inlet opening being located directly above said plate. 
     
     
       3. In the vessel of claim 1 wherein said vessel is of double walled construction, and said cryogenic liquid is nitrogen which fills said vessel to said predetermined level. 
     
     
       4. In the vessel of claim 2 wherein the cross section area of said side opening is the same size as the cross section area of said exhaust tube. 
     
     
       5. In the vessel of claim 1 wherein the cross section area of said side opening is the same size as the cross section area of said exhaust.